Electric heater



S. E. NUTTING. ELECTRIC HEATER.

Patented Feb. 27

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UNITED STATES PATENT OEEICE.

SAMUEL E. NUTTING, OF CHICAGO, ILLINOIS.

ELECTRIC HEATER.

SPECIFICATION forming part of Letters Patent No. 515,693, dated February 27, 1894.

Application filed April 27, 1893. SerialNo. 472,064. (No model.)

T0 60H who/rt t may concern.-

Beit known that I, SAMUEL E. NUrrrNe, of Chicago, Illinois, have invented certain new and useful Improvements in Electric Heaters, of which the following is a specication.

My invention relates to that class of electric heaters in which a resistance wire or series of wires is used, and heat generated therein from the resistance of the wire to the electric current flowing through the same; and the invention consists in the features, details and combinations hereinafter described and claimed.

In the drawings, Figure l represents a plan view of my improved heater; Fig. 2 a sectional view of the same taken on the line 2 of Fig. I; and Fig. 3 a plan view of a portion of the heater, with the outer covering,` removed and showing the method I employ for embedding the resistance wires.

The object of my invention is to provide an electric heater, composed of the resistance wires embedded in a non-electric conducting substance and covered with a non-electric conducting flexible covering, in such manner as to protect the wires from direct contact with the air, the whole being light and durable, so that it maybe moved easily from place to place.

A further object of my invention is to provide the heater proper with a covering of min` eral wool, or similar substance, and provide the same with an outer envelope of textile fabric, preferably wool, entirely inclosing the heater proper and covering of mineral wool connecting the terminals of the resistance wires with an insulated cable for furnishing the heater with a supply of electric current.

Vhile I prefer to show in the drawings my invention as applied to a portable electric heater that may be used as a foot warmer, or to supply warmth to any desired portion of the body, I do not desire to be limited to this particular use, as I contemplate using it in connection with various other purposes.

In my preferred construction, as illustrated in the drawings, I employ a base A, formed of a sheet of flexible asbestus material, and secure on either side of the base a series of resistance wires,preferably formed of German silver arranged in a zig zag manner, to compensate for expansion and contraction of the solution with an outer covering I), preferably composed of flexible sheets of abestus material. The silicate of soda becomes hardened, and acts as a cement to imite the base and outer covering, and securethem together. I then surround the outer covering of asbestus material with a packing, E, preferably of mineral wool, and inclose the heater proper with its packing of mineral wool in an envelope G, formed preferably of a woolen cloth, and secure the same together by quilting or sewing in any usual manner. I then attach to the terminals II and II of the resistance wires an insulated cable, I, which is connected at its other end with a terminal connector K, adapted to beinserted into an ordinary socket L, provided with a usual switch button, l, by which the electric current may be turned on or shut olf at pleasure.

Fromtheforegoingdescriptionit will beseen that I have provided an electric heater that is light and portable. The various parts constituting the same are formed of flexible nonelectric conducting materials, so that the same may be conformed to any desired shape, without destroying any of the parts or rendering theA heater less efficient.

I claim#- l. An electric heater, composed of electric Wires provided with terminals embedded in a non-conducting cement and between two layers of a iiexible, non-conducting material,sub stantially as described.

2. An electric heater, composed of electric wires provided with terminals embedded in a non-conducting cement and between two layers of a flexible non-conducting material, in combination with an outer covering of textile fabric, substantially as described.

In electric heaters, the combination of a base formed of a sheet of asbestus material, electric resistance wires attached to this base, an outer covering of flexible asbestus material, silicate of soda filling the space occupied by the resistance wires between the base and IOO outer covering and forming, a cement to unite the same and hold the Wires in place, and an outer covering of textile fabric forming an envelope for the heater proper, substantially as described.

4. In electric heaters, the combination of electric resistance Wires embedded in a nonconducting cement, two layers of iiexible nonconducting material forming an outer covering for the same, an outer envelope of textile fabric, and a packing of mineral wool interposed between the envelope and the heater proper, substantially as described.

5. In electric heaters, the combination of electric resistance wires embedded in a nonconducting cement, two layers of flexible nonconducting material forming an outer covering for the same, an outer envelope of textile fabric, a packing of mineral wool interposed between the envelope and the heater proper, a set of electric wires for connecting the heater proper with a terminal connector, and a ter-l minal connector, substantially as described.

SAMUEL E. NUTTING.

Witnesses THOMAS A. BANNING, vSAMUEL E. HIBBEN. 

